From 09d88fc3db9265732c7960ee52240b1196dcee71 Mon Sep 17 00:00:00 2001
From: David Härdeman <david@hardeman.nu>
Date: Fri, 26 Jun 2020 22:26:14 +0200
Subject: Split off all server functionality to a separate file

---
 minecctl/server.c | 198 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 198 insertions(+)
 create mode 100644 minecctl/server.c

(limited to 'minecctl/server.c')

diff --git a/minecctl/server.c b/minecctl/server.c
new file mode 100644
index 0000000..8a32486
--- /dev/null
+++ b/minecctl/server.c
@@ -0,0 +1,198 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "utils.h"
+#include "minecctl.h"
+#include "server.h"
+#include "misc.h"
+#include "config-parser.h"
+#include "server-config-options.h"
+
+void
+read_server_config(struct cfg *cfg, struct server *server)
+{
+	char buf[4096];
+	size_t off = 0;
+	ssize_t r;
+	int dfd;
+	int fd;
+	char *pos = buf;
+
+	if (!server || !server->filename || server->file_read)
+		return;
+
+	server->file_read = true;
+
+	dfd = open(cfg->cfgdir, O_DIRECTORY | O_PATH | O_CLOEXEC);
+	if (dfd < 0)
+		die("Failed to open %s: %m", cfg->cfgdir);
+
+	fd = openat(dfd, server->filename, O_RDONLY | O_CLOEXEC);
+	if (fd < 0)
+		die("Failed to open %s: %m", server->filename);
+
+	close(dfd);
+
+	while (true) {
+		r = read(fd, buf + off, sizeof(buf) - off - 1);
+		if (r < 0)
+			die("Failed to read %s: %m", server->filename);
+		else if (r == 0)
+			break;
+
+		off += r;
+		if (off == sizeof(buf) - 1)
+			die("Failed to read %s: file too large", server->filename);
+	}
+
+	buf[off] = '\0';
+	close(fd);
+
+	if (!config_parse_header(SERVER_CFG_HEADER, &pos))
+		die("Unable to parse %s: invalid/missing header",
+		    server->filename);
+
+	/* FIXME: this will cause superflous DNS lookups of other cfg entries */
+	while (true) {
+		int key;
+		const char *keyname;
+		struct cfg_value value;
+
+		if (!config_parse_line(server->filename, &pos, scfg_key_map,
+				       &key, &keyname, &value, false))
+			break;
+
+		switch (key) {
+		case SCFG_KEY_RCON:
+			if (!list_empty(&server->rcon_addrs))
+				die("rcon address defined twice in %s",
+				    server->filename);
+			list_replace(&value.saddrs, &server->rcon_addrs);
+			break;
+		case SCFG_KEY_RCON_PASSWORD:
+			if (server->rcon_password)
+				die("rcon password defined twice in %s",
+				    server->filename);
+			server->rcon_password = xstrdup(value.str);
+			break;
+		case SCFG_KEY_REMOTE:
+			if (!list_empty(&server->mc_addrs))
+				die("rcon address defined twice in %s",
+				    server->filename);
+			list_replace(&value.saddrs, &server->mc_addrs);
+		default:
+			continue;
+		}
+	}
+
+	if (!server->rcon_password)
+		verbose("rcon password not found in %s", server->filename);
+
+	if (list_empty(&server->rcon_addrs))
+		verbose("rcon address not found in %s", server->filename);
+
+	if (list_empty(&server->mc_addrs))
+		verbose("mc server address not found in %s", server->filename);
+}
+
+struct server *
+get_default_server(struct cfg *cfg)
+{
+	struct server *server;
+
+	server = list_first_entry_or_null(&cfg->servers, struct server, list);
+	if (!server)
+		die("No servers defined");
+
+	read_server_config(cfg, server);
+
+	return server;
+}
+
+bool
+set_default_server(struct cfg *cfg, const char *name)
+{
+	struct server *server;
+
+	assert_die(cfg, "invalid arguments");
+
+	list_for_each_entry(server, &cfg->servers, list) {
+		if (streq(name, server->name)) {
+			list_rotate_to_front(&server->list, &cfg->servers);
+			return true;
+		}
+	}
+
+	return false;
+}
+
+void
+get_servers(struct cfg *cfg)
+{
+	struct dirent *dent;
+	DIR *dir;
+
+	dir = opendir(cfg->cfgdir);
+	if (!dir) {
+		info("Can't open config directory %s: %m", cfg->cfgdir);
+		return;
+	}
+
+	while ((dent = readdir(dir))) {
+		struct server *server;
+		char *suffix;
+
+		if (!is_valid_server_config_filename(dent, NULL))
+			continue;
+
+		server = server_new();
+		server->filename = xstrdup(dent->d_name);
+
+		suffix = strrchr(dent->d_name, '.');
+		assert_die(suffix, "Error parsing filename");
+		*suffix = '\0';
+		server->name = xstrdup(dent->d_name);
+
+		list_add(&server->list, &cfg->servers);
+	}
+
+	closedir(dir);
+}
+
+void
+server_free(struct server *server)
+{
+	struct saddr *saddr, *tmp;
+
+	xfree(server->name);
+	xfree(server->filename);
+	free_password(&server->rcon_password);
+
+	list_for_each_entry_safe(saddr, tmp, &server->rcon_addrs, list) {
+		list_del(&saddr->list);
+		xfree(saddr);
+	}
+
+	list_for_each_entry_safe(saddr, tmp, &server->mc_addrs, list) {
+		list_del(&saddr->list);
+		xfree(saddr);
+	}
+
+	xfree(server);
+}
+
+struct server *
+server_new()
+{
+	struct server *server;
+
+	server = zmalloc(sizeof(*server));
+	INIT_LIST_HEAD(&server->rcon_addrs);
+	INIT_LIST_HEAD(&server->mc_addrs);
+	INIT_LIST_HEAD(&server->list);
+
+	return server;
+}
+
-- 
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